Experimental Study on Assessing Interaction of Quay Walls and Random Waves Using Artificial Neural Network

Vafaei Poursorkhabi, Ramin; Ejlali, Reza Gholi; Naseri, Alireza; Hosseinchi Gharehaghaji, Amin

doi:10.22034/ijcoe.2023.341042.0

Experimental Study on Assessing Interaction of Quay Walls and Random Waves Using Artificial Neural Network

Document Type : Original Research Article

Authors

¹ Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

² Department of Geomatics Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran

10.22034/ijcoe.2023.341042.0

Abstract

Quay walls are sheltering structures used for protecting coastal regions against wave-induced forces. Because of the random nature of the wave behavior, the application of physical models for the study of wave-structure interaction can be quite efficient. The aim of this study was to investigate the behavior of quay walls under random waves through experimental methods. The study used walls with vertical geometrical form, which were exposed to sea random waves under the JONSWAP spectrum. Surface level and wall strain values were measured using built-in sensors. A neural network model was developed using the feed-forward method with the backpropagation algorithm to analyze the time series of water surface level and strain. High coefficients of determination during the training and verification phases were observed, indicating good network performance. Self-correlation analysis of the time series showed that the data exhibited first-degree Markov characteristics. This finding was taken into consideration and increased the coefficients of determination in the neural network model.

Keywords

Main Subjects

Coastal Engineering

References

[1] Vafaeipour Sorkhabi, R., Naseri, A., Alami, M. T., and Mojtahedi, A. (2022), Experimental Study of an Innovative Method to Reduce the Damage of Reshaping Rubble Mound Breakwaters, Innovative Infrastructure Solutions, 7(6), 353.

[2] Alami, M. T., Vafaeipour Sorkhabi, R., Naseri, A., and Mojtahedi, A. (2022), Enhancing Stability and Reduce Damage in Rubble-Mound Reshaping Breakwaters by Using Obstacles in Front of the Structure, Civil Infrastructure Researches, 7(2), 33-49.

[3] Vafaeipour Sorkhabi, R., and Naseri, A. (2021), Experimental Investigation of Optimal Slope Determination of Seawalls Subjected to Random Sea Waves based on Base Shear and Overturning Moment, Amphibious Science and Technology, 2(3), 37-49.

[4] Vafaeipour Sorkhabi, R., and Naseri, A. (2019), Experimental Investigation of the Interaction Between Vertical Flexible Seawall and Random Sea Waves, Journal of Advanced Defense Science & Technology, 6(3): 155-162.

[5] Sainflou, G., (1928), Essai sur les digues maritimes verticals. Annales de ponts et chaussées, 98(1), 5-48.

[6] Rundgren, L., (1958), Water wave forces : a theoretical and laboratory study, Bulletin 549 Royal Institute of Technology, Division of Hydraulics, Stockholm, Sweden.

[7] Minikin, R., (1950), Wind Waves and Maritime Structures: Studies in Harbor Making and in Protection of Coasts, Charles Griffin & Company, London, 224-304.

[8] Goda, Y., (2010), Random Seas and Design of Maritime Structures, Advanced Series on Ocean Engineering, World Scientific.

[9] Vijayakrishna, E., Natarajan, and R., Neelamani, S., (2004), Experimental Investigation on the Dynamic Response of a Moored Wave Energy Device under Regular Sea Waves, Ocean Engineering, 31(5): 725- 743.

[10] Hughes, S.A., (2004), Wave momentum flux parameter: A Descriptor for Near Shore Waves, Coastal Engineering, 51(11): 1067-1084.

[11] Neelamani, S., Jawguei, L., and Shangchun, C., (2010), An Experimental Study of Wave Forces on Vertical Breakwater, Journal of Marine Science and Technology, 15(3): 158-170.

[12] Cumo, G., Allsop, W., and Takahashi, S., (2010), Scaling Wave Impact Pressures on Vertical Wall, Coastal Engineering, 57 (6): 604-609.

[13] Vafaeipour Sorkhabi, R., Alami, M., Naseri, A., and Mojtahedi, A. (2022), Experimental Analysis of the Effect of a Submerged obstacle and Floating Wave Barrier in front of a Rubble Mound Breakwater on Diminishing the Damage Parameter, International Journal of Coastal, Offshore and Environmental Engineering, 7(2), 39-48.

[14] SPM, (1984), Shore protection manual, Coastal Engineer's Research Center, U.S Army corps.

[15] Osgouei, A. D., Poursorkhabi, R. V., Maleki, A., and Ahmadi, H. (2021), Effects of a Floating Wave Barrier with Square Cross Section on the Wave-induced Forces Exerted to an Offshore Jacket Structure, Ocean Systems Engineering, 11(3), 259-274.

[16] Naseri, A., Sorkhabi, R. V., Alami, M. T., and Mojtahedi, A. (2022), Damage Parameter Variations of Breakwater along with a Floating Wave Barrier and a Submerged Obstacle, International Journal of Sustainable Construction Engineering and Technology, 13(1), 202-217.

[17] Vafaeipour, R., Lotfollahi, M., and Aminfar, M., (2011), The Effect of Random Waves Period on Coastal Wall Reaction with Various Geometrical Shapes with Numerical Method, Journal of Oceanography, 8, 69-78.

[18] Sorensen, R.M., (1993), Basic Wave Mechanic for Coastal and Ocean engineering, Jon Wiley.

[19] Alami, M., Vafaeipoor, R., Naseri, A., Mojtahedi, A. (2022), Experimental Analysis of the Effect of the Distance of a Submerged Berm in front of a Reshaping Rubble Mound Breakwater on Diminishing the Damage Parameter, Journal of Civil and Environmental Engineering, 52.2(107), 1-13.

[20] Strain Gauge TML Pam E-101R, (2012), Sokki Kenkyujo Company, Ltd. Tokyo.

[21] Nourani, V., komasi, M., and Mano, A., (2009), A Multivariate ANN - Wavelet Approach for Rainfall Runoff Modeling, Water Recourse Management, 36,1251-1257.

[22] Motamedi, H., Rahbani, M., Harifi, A., and Ghaderi, D. (2020). The choice between Radial Basis function and Feed Forward Neural Network to predict long term tidal condition. International Journal of Coastal, Offshore And Environmental Engineering, 5(1), 1-9.